---
title: "MAINLINE MANAGEMENT LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d22c19b2-67ca-5522-92c8-7f06748b20ea
json: https://whiteintel.dev/api/public/dossier/d22c19b2-67ca-5522-92c8-7f06748b20ea
identifier: sec:0001365478
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MAINLINE MANAGEMENT LLC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001365478`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/d22c19b2-67ca-5522-92c8-7f06748b20ea  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d22c19b2-67ca-5522-92c8-7f06748b20ea  

## Ownership & control

### Holdings / subsidiaries

- **BUCKEYE GP HOLDINGS L.P.** (other) — https://whiteintel.dev/entity/7f3653a5-7de0-5c42-8e7d-58941b88fe43

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MAINLINE MANAGEMENT LLC**. Human view: https://whiteintel.dev/entity/d22c19b2-67ca-5522-92c8-7f06748b20ea · Structured JSON: https://whiteintel.dev/api/public/dossier/d22c19b2-67ca-5522-92c8-7f06748b20ea._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._